/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.extensions.sql.impl.udf;



import com.google.auto.service.AutoService;

import com.bff.gaia.unified.sdk.schemas.Schema;



/**

 * IS_NAN(X)

 *

 * <p>Returns TRUE if the value is a NaN value. Returns NULL for NULL inputs. input: Float, Double

 *

 * <p>Output: Boolean

 */

@AutoService(UnifiedBuiltinFunctionProvider.class)

public class IsNan extends UnifiedBuiltinFunctionProvider {

  private static final String SQL_FUNCTION_NAME = "IS_NAN";



  @UDF(

      funcName = SQL_FUNCTION_NAME,

      parameterArray = {Schema.TypeName.FLOAT},

      returnType = Schema.TypeName.BOOLEAN)

  public Boolean isNan(Float value) {

    return Float.isNaN(value);

  }



  @UDF(

      funcName = SQL_FUNCTION_NAME,

      parameterArray = {Schema.TypeName.DOUBLE},

      returnType = Schema.TypeName.BOOLEAN)

  public Boolean isNan(Double value) {

    return Double.isNaN(value);

  }

}